Pneumatic tire.



PATENTED JAN. .17, 1905.

W. STRUUK. PNEUMATIC TIRE.

APPLICATION FILED APR. 8, 1904.

1T0. 780,452. Patented January 17, 1905.

UNITED STATES PATENT OFFICE.

WILHELM STRUCK, OF FRIEDENAU. NEAR BERLIN, GERMANY, ASSIGNOR TO B.POLAOK, OF WALTERSHAUSEN, THURINGEN, GERMANY.

PNEUMATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 780,452, dated anuary17, 1905.

' Application filed April 8, 1904. Serial No. 202,225.

To 0ZZZ whom it may concern:

cover within the channel I further provide a tongue-andgroove connectionbetween the edges of the cover and the walls of the channels.

In order to prevent the edges from moving ands are thus held securelywithin'the channel formed by the grooves of the base i and rims k and Z.

Having described my invention, what I Be it known thatLWILHELMSTRUoK,acitiwithin the channel of the felly, the edges d 5 zen of thefree'town of Hamburg, and a resiand 6 may be provided with tongues 9,(see dent of 12 Illstrasse, Friedenau, near Berlin, Figs. 1 and 3,)engaging grooves 1" in the felly- I Germany, have invented certain newand use-- base 'Z. The-base Z and the rims 7c and Z may fulImprovementsin Pneumatic Tires, of which be grooved in such. a manner so as to formclaws the following is a specification. w and 3 engaging a greater partof the edges The present invention relates to pneumatic c and (Z. (SeeFig. 5.) The rims 7c and Z may tires, and especially to the kind havingflexibe heldmorefirmlyto the felly by means of any ble but inextensiblecover edges and removsuitable fastening device. able felly-rims; and theobject of my inven- When it is desired to secure the parts totion is toprovide improved means for securgether, the rims la and Z are removedand the ing the cover to thefelly. I attain the said air-tube it, withthe cover a, is placed on the objects by providing in the felly channelsfelly. Thereupon the projections n of the having overhanging side wallsand in which rims 7c and Z are inserted'through the openthe reinforcededges of the cover rest, and for ings m and turned a little, so as tointerlock the purpose of preventing movement of, the with the edge .5 ofthe felly, and the edges cZ 5 My invention is illustrated in the annexedclaim is 7 drawings, in which 1. In a pneumatic tire, the combinationwith Figurelisavertical section of my improved an air-tube and a coverhaving reinforced tire. Fig. 2 shows a part of the felly. Fig. 3 edges,said edges being flexible but inextensishows a part of the felly and thecover. Fig. ble, of a felly, tongue-andgroove connec- 4 is a part of thefelly with the removable tions between said edges and said felly, rerimsseen from the interior. Fig. 5 is a detail movable rims on said felly,said felly and said view of a slightly-modified form of construcrimshaving grooves forming when the rims tion. are secured on the felly achannel the walls The tire consists of the air-tube h and the of whichoverlap the edges of the cover, and cover a, of which the flanges Z andc termimeans for securing the rims on the felly. 8O natc in reinforcededges tZand e, that are flexi- 2. In a pneumatic tire, the combinationwith ble but ineX'tensible. an air-tube and a cover having reinforcedThe felly consists of the base c' and the two edges, said edges beingflexible but inextensirims 7c and Z, provided with downwardly-eX- ble,of a felly, removable rims, said felly and tending projections n, whichengage circumsaid rims having grooves adapted to receive 5 ferentialgrooves in the felly. The projectthe cover edges, and interlockingtongue-anding edges s of the felly are provided with groove connectionsbetween said felly and openings m, through which the projections a saidrims. of the rims can pass to rest in the grooves of- The foregoingspecification signed at Berthe felly and when turned'a little engage the9 edges 8. The parts k, 2', and Z are grooved, so as to receive theedges cZ and eof the cover a, and when the rims are placed on the tirethe edges are held securely in place. Each of the rims 7a and Z may bein one piece or each may consist'of several pieces.

'lin, Germany, this 23d day anuary, 1904.

WILHELM STRUCK.

In presence of- WOLDEMAR HAUPT, HENRY HASPER.

